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  • 1
    Electronic Resource
    Electronic Resource
    Discrete voltage states in one-dimensional parallel array of Josephson junctions (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 3180-3182 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We study low-voltage dynamics in highly discrete one-dimensional arrays of Josephson junctions. In particular, we focus on the resonant solutions emerging from the locking between the time period of the oscillations of the single junction with the spatial period of the wave propagating across the array. We find that the average voltage across the array scales as V∝(κ−κc)1/2, where κc is the critical value of the coupling. The connections to high voltage solutions are discussed. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.115817
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  • 2
    Electronic Resource
    Electronic Resource
    The effect of rotational Brownian motion on Witten–Sander aggregates (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 2147-2153 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The effect of rotational diffusion on the growth of Witten–Sander aggregates is examined. Computer simulations of a model are analyzed where the growing aggregate rotates with a rotational diffusion constant Drot(R(parallel))∼1/[τrot(R(parallel)/a)δ], while the irreversibly aggregating particles jump with a diffusivity a2/τ0(τ0,τrot are the time constants for translational and rotational jumps and a is the lattice spacing). In the simulations 0.0002〈(τ0/τrot)〈1600 is varied over seven orders of magnitude. In general the aggregates are anisotropic (despite the inherent symmetry of the model) with longitudinal and transverse length scales R(parallel) and R⊥. On scales r(very-much-less-than)R⊥ the cluster remains fractal, but on scales R⊥(very-much-less-than)r(very-much-less-than)R(parallel) the cluster becomes linear. Estimates of the dependence of R(parallel) on N, (τ0/τrot), and δ are made and compared with the computer data. Both initial and asymptotic behavior are investigated, and several regimes of growth identified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451107
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  • 3
    Electronic Resource
    Electronic Resource
    Mean field theory of polymer crossover behavior (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 85 (1986), S. 527-531 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: An argument is presented that the exponent previously employed to describe crossover behavior of either a linear or randomly branched polymer from the theta region to the swollen or collapsed state is inconsistent with the mean field description of the polymer free energy. In place of the conventional exponent φ(d)=[2−dνθ(d)], it is suggested that mean field theory compels use of the exponent ψ(d)=[νθ(d)d−1], where νθ(d) is the index which describes the dependence of polymer length on molecular weight in the theta region. The consequences of this different choice of crossover index are discussed for crossover behavior of the polymer length and for phase separation behavior. Comparison of the results of the different predictions with both Flory–Huggins theory and ε-expansion calculations is included. For linear chains in two dimensions striking differences are found for the predicted behavior of the phase separation curve at high monomer concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.451631
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  • 4
    Electronic Resource
    Electronic Resource
    Application of the dynamic renormalization group to non-equilibrium instabilities: Thek=0 hard mode transition (1978)
    Springer
    The European physical journal 31 (1978), S. 401-406 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The behaviour of correlation functions of a complex fieldW close to thek=0 hard mode transition of a non-equilibrium system are investigated using the dynamic renormalization group. The Langevin equation forW is closely related to then=2 time-dependent Ginzburg-Landau equation, but in this case one finds two relevant scaling fields. This leads to a behavior which is more closely related to that expected at tricritical points.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01351551
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  • 5
    Electronic Resource
    Electronic Resource
    Dynamics of the one dimensional ideal spin glass (1980)
    Springer
    The European physical journal 37 (1980), S. 243-247 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The dynamical susceptibility and relaxational behaviour of the one dimensional ideal spin glass obeying Glauber's model is considered. The dynamics can be found exactly as they are related by a transformation to the dynamics of the Ising model. The susceptibility does not show simple relaxational behaviour, rather it can be scaled by two relaxation timesτ 1 andτ 2 , with dynamical exponentsz 1=2 andz 2=1, which are just the arithmetic and geometric means of the related ferromagnetic and antiferromagnetic relaxation times. The critical slowing down at lower temperatures will result in an increasingly nearly elastic contribution to diffuse magnetic neutron scattering, while at higher temperatures the susceptibility is dominated by independent spin relaxation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01323038
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  • 6
    Electronic Resource
    Electronic Resource
    Dynamics of the one dimensional randomly dilute Ising ferromagnet (1980)
    Springer
    The European physical journal 37 (1980), S. 351-355 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of randomly dilute impurities in the percolation limit on the relaxation of magnetization 〈M(t)〉 and on the way the time-dependent correlation function 〈M(t)M(0)〉 decays in a one dimensional Ising ferromagnet is considered, as is the behaviour of the dynamic susceptibility. It is found that the decay of the magnetization is hardly altered except for small faster decaying boundary effects. However, the correlation function is drastically altered, decaying in general faster asymptotically than the pure system. The dynamical susceptibility also changes, showing a breaking in the simple relaxational scaling form of the pure system. Crossover behaviour with non-critical slowing down (apart from the critical slowing down asT→T c=0) is also observed in the transition from the pure ferromagnetic to randomly dilute behaviour.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01352746
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  • 7
    Electronic Resource
    Electronic Resource
    Critical dynamics in a soluble model of dilute ferromagnetism (1980)
    Springer
    The European physical journal 39 (1980), S. 311-317 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The critical dynamics of the Syozi model for dilute ferromagnetism is considered by the use of master equations. The dynamics is soluble as it is assumed that the time scale of motion on the sublattice on which the impurities move is so much faster than on the other sublattice that fast relaxing variables may be adiabatically eliminated, leaving a new ‘soluble’ master equation. It is found that the linear and non-linear relaxation of magnetization exponentsΔ (l) andΔ (nl) increase on dilution toΔ (l)/(1−α) andΔ (nl)/(1−α) respectively (α is the specific heat exponent for the pure system, which itself changes on dilution to −α/(1−α)). Thus if the exponents for the pure system obey the scaling law of Rácz and FisherΔ (nl)=Δ (l)−β (β is the magnetization exponent which changes on dilution to β/(1−α)) then so do the exponents for the diluted system. Similarly the exponent Δ for spin diffusion changes on dilution to Δ/(1−α).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01305830
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  • 8
    Electronic Resource
    Electronic Resource
    Correcting errors with glasses (1989)
    [s.l.] : Nature Publishing Group
    Nature 339 (1989), S. 662-662 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] N. SOURLAS points out an unexpected relationship between spin glasses and error-correcting codes on page 693 of this issue1. Spin glasses can be used as machines to correct automatically errors occurring during transmission in a message if the message is properly encoded before being sent; under ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/339662a0
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  • 9
    Electronic Resource
    Electronic Resource
    Partial miscibility of liquid mixtures of protonated and deuterated high polymers (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 18 (1980), S. 853-861 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Certain low-angle neutron scattering experiments on bulk protonated polymers containing a fraction of the deuterated species (or vice versa) suggest that clustering of like isotopes is occurring. In order to see whether this is likely, a form for the Helmholtz free energy of mixing is proposed, using thermodynamics and the ideal solution (Flory-Huggins) entropy of mixing. From this free energy the upper consolute point Tc is found. Tc is calculated for several isotopic molecular solutions. The results suggest that while isotope segregation phenomena are impossible for small hydrocarbons, they may become important for large polymer systems.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1980.180180416
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  • 10
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    Quenched disorder enhances chaotic diffusion (1998)
    American Physical Society
    Details
    Publication Date: 1998-10-01
    Print ISSN: 1063-651X
    Electronic ISSN: 1095-3787
    Topics: Physics
    Published by American Physical Society
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